Autolite 3911 race plug or the resistor street plug # 3923,3924 or maybe the colder 3923 or 3922 with aluminum heads nowscope up twocents

Last edited by Cab_Burge; 01/26/23 04:40 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)